<template>
    <div>
            <!-- 面包屑导航 -->
        <el-breadcrumb separator="/">
        <el-breadcrumb-item :to="{ path: '/home' }">首页</el-breadcrumb-item>
        <el-breadcrumb-item>数据统计</el-breadcrumb-item>
        <el-breadcrumb-item>数据报表</el-breadcrumb-item>
        </el-breadcrumb>
        <!-- 卡片视图区 -->
        <el-card>
            <!-- 2 -->
           <div id="main" style="width: 750px;height:400px;"></div>
        </el-card>
    </div>
</template>
<script>
import echarts from 'echarts'
export default {
    data(){
        return{}
    },
    created(){},
    // 只要执行到了这个函数，此时页面上的元素已经被渲染完毕了
    mounted(){
        this.drawLine();
    },
    
    methods:{
         
        async drawLine(){
                // 3.基于准备好的dom，初始化echarts实例
            var echarts = require('echarts');
            var myChart = echarts.init(document.getElementById('main'))
            
            const {data:res} = await this.$http.get('reports/type/1')
            if(res.meta.status!=200){
                return this.$message.error('获取折线图数据失败！')
            }
            
            // 4.指定图表的配置项和数据
        
            // 5.展示数据
            myChart.setOption(res.data);
            }
    }
}
</script>
<style lang="less" scoped>
    
</style>
